I have a geo with what looks like hith it was purchased cheap with 2 small leasions on its head , after the last waterchange it now has 5 small holes and has been bashing its head on ornaments in the tank just wondering how much salt i can add to my community tank 120gal my stocking list goes 2 oscars ,2, geophagus red heads, 1 salmon cat,1 mystus cat, 2 plecos (common) 1 gold severum ,1 green terror, 1 blue acara.